Valdemar wrote: johnlocke wrote:
Valdemar wrote:If not a defective batch then they must have knowingly signed up for 1 or potentially 2 warranty replacements in hotter areas. I just cannot believe they didn't have the data after the original 11/12 pack debacle. Who knows, perhaps they ran the numbers and between the lower battery manufacturing costs and EV credits they still come out ahead overall, and it was simply a business decision.
Remember that this is a world-wide decision on their part. We are not hearing about battery failures in Europe or Japan so Nissan has probably decided to just bear the warranty costs. That is much cheaper than issuing a recall to replace defective batteries. First, it spreads the costs out over a longer period. Second, only obvious failures will be replaced so marginal batteries will remain in service. Third, you still have to go through the warranty process which will deter some and some procrastinators will time out on the warranty.
Nissan doesn't seem to care about their reputation as an EV builder so I have to assume that the Leaf is ultimately just a compliance car built to allow Nissan to sell larger ICE vehicles like trucks and SUV's with much higher margins in the US. Leafs do well enough in Europe and Japan and maybe their plan is to cede the US market to Tesla and GM.
Are you saying this was a defective batch?
No, What I'm saying is that this is a design flaw and appears to affect all the 30 KWH batteries. They aren't heat tolerant enough for the South and Southwest U.S. Whether we see some early failures in the Midwestern states is still uncertain but we do have reports of some loss of capacity already. If you live in an area with short summers or highs of less than 90 degrees, there's a likelihood that your battery will last significantly longer. On the other hand, there's an eight year, 100k warranty period so Nissan has increased exposure. There could be a high failure rate toward the end of the warranty period even in areas with mild climates. We are two years into an eight year warranty period and we have already started to see warranty failures. A lot of the 24KWh packs made it to the 5 year mark without triggering the warranty. They are still degraded, just not badly enough to trigger a replacement.
Even if your battery does last for 100,000 miles, odds are that it will still be significantly degraded (70% or less) at that point. For most people that's not really acceptable. Even Nissan has said that the battery is only expected to retain 80% at 100k. It appears that 60-65% is the warranty trigger point. Will you be happy with with a 20KWH car?